Table 1.

Characteristics of internode material from juvenile shoots (sampled from a 2-year-old plant) used for light microscopy and TEM

Shoot	Internode	Characteristics
Immature (20 cm in height)	Apex material (containing apex and un-elongated internodes)	Very soft, light green in colour
	Internode 4 (1st elongating internode)	Very soft, light green in colour, 1·0 cm long
	Internode 3 (elongating)	Soft, green in colour, 3·0 cm long
	Internode 1 (maturing)	Hard and brownish in colour, 4·5 cm long
Mature (60 cm in height)	Internode 1 (maturing)	Hard and brownish in colour, 4·0 cm long